1. Size: 16.5*6*4cm
2. Voltage: 220V
3. Tightening: 16.5 cm stretching: 21.5 cm
4. Multi-stage timing adjustment keep constant temperature safe and reliable
5. Good quality and durability
6. Better heat dissipation and flame retardant
7. Easy to use
8. Suitable for all kinds of mountaineering shoes snow boots cotton slippers leather shoes socks children's shoes etc.